(written from a Production point of view)
Jennifer Duncan was a 21st centuries female Human mentioned on a medical file prepared for "Carpenter Street". While a number of forms different were seen on screen, none of them were readable or even especially recognizable, so it remains unclear if the information about Duncan was seen in the episode.
According to this form, she was born on April 25, 1975 and lived at 14027 West Birch Street in Detroit. On September 30, 2004, Duncan was a blood donor at the Porter Street blood bank in Detroit, Michigan.
The form can be seen at YourProps.com.